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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef INCLUDED_FRAMEWORK_INC_THREADHELP_ITRANSACTIONMANAGER_H
21 : #define INCLUDED_FRAMEWORK_INC_THREADHELP_ITRANSACTIONMANAGER_H
22 :
23 : #include <general.h>
24 : #include <com/sun/star/uno/RuntimeException.hpp>
25 : #include <com/sun/star/lang/DisposedException.hpp>
26 :
27 : namespace framework{
28 :
29 : /*-************************************************************************************************************
30 : @descr Describe different states of a feature of following implementation.
31 : During lifetime of an object different working states occur:
32 : initialization - working - closing - closed
33 : If you wish to implement thread safe classes you should use this feature to protect
34 : your code against calls at wrong time. e.g. you are not full initialized but somewhere
35 : call an interface method (initialize phase means startup time from creating object till
36 : calling specified first method e.g. XInitialization::initialze()!) then you should refuse
37 : this call. The same for closing/disposing the object!
38 : *//*-*************************************************************************************************************/
39 : enum EWorkingMode
40 : {
41 : E_INIT , // We stand in a init method -> some calls are accepted - some one are rejected
42 : E_WORK , // Object is ready for working -> all calls are accepted
43 : E_BEFORECLOSE, // We stand in a close method -> some calls are accepted - some one are rejected
44 : E_CLOSE // Object is dead! -> all calls are rejected!
45 : };
46 :
47 : /*-************************************************************************************************************
48 : @descr If a request was refused by a transaction manager (internal state different E_WORK ...)
49 : user can check the reason by using this enum values.
50 : *//*-*************************************************************************************************************/
51 : enum ERejectReason
52 : {
53 : E_UNINITIALIZED ,
54 : E_NOREASON ,
55 : E_INCLOSE ,
56 : E_CLOSED
57 : };
58 :
59 : /*-************************************************************************************************************
60 : @descr A transaction object should support throwing exceptions if user used it at wrong working mode.
61 : e.g. We can throw a DisposedException if user try to work and our mode is E_CLOSE!
62 : But sometimes he dont need this feature - will handle it by himself.
63 : Then we must differ between some exception-modi:
64 : E_NOEXCEPTIONS We never throw any exceptions! User handle it private and looks for ERejectReason.
65 : E_HARDEXCEPTIONS We throw exceptions for all working modes different from E_WORK!
66 : E_SOFTEXCEPTIONS We throw exceptions for all working modes different from E_WORK AND E_INCLOSE!
67 : This mode is useful for impl-methods which should be callable from dispose() method!
68 :
69 : e.g. void dispose()
70 : {
71 : m_aTransactionManager.setWorkingMode( E_BEFORECLOSE );
72 : ...
73 : impl_setA( 0 );
74 : ...
75 : m_aTransactionManager.setWorkingMode( E_CLOSE );
76 : }
77 :
78 : void impl_setA( int nA )
79 : {
80 : ERejectReason EReason;
81 : TransactionGuard aTransactionGuard( m_aTransactionManager, E_SOFTEXCEPTIONS, eReason );
82 :
83 : m_nA = nA;
84 : }
85 :
86 : Normaly (if E_HARDEXCEPTIONS was used!) creation of guard
87 : will throw an exception ... but using of E_SOFTEXCEPTIONS suppress it
88 : and member "A" can be set.
89 : *//*-*************************************************************************************************************/
90 : enum EExceptionMode
91 : {
92 : E_NOEXCEPTIONS ,
93 : E_HARDEXCEPTIONS,
94 : E_SOFTEXCEPTIONS
95 : };
96 :
97 : /*-************************************************************************************************************
98 : @descr How can you use the transaction manager?
99 : Use it in combination with an TransactionGuard, which register your transaction in ctor
100 : and release in dtor automaticly! Follow interface class can be used to make using
101 : of different manager implmentations possible by using same guard.
102 : *//*-*************************************************************************************************************/
103 0 : class ITransactionManager
104 : {
105 :
106 : // public methods
107 :
108 : public:
109 :
110 : /*-****************************************************************************************************
111 : @descr These functions must be supported by a derived class!
112 : getWorkingMode() -return current set working mode
113 : setWorkingMode() -change working mode
114 : (This will block till all current transactions are finished!)
115 : isCallRejected() -test method to check if a call will be rejected by wrong working mode or not
116 : registerTransaction() -start new transaction (increase internal transaction count)
117 : unregisterTransaction() -finish transaction (decrease internal transaction count)
118 : *//*-*****************************************************************************************************/
119 : virtual EWorkingMode getWorkingMode ( ) const = 0;
120 : virtual void setWorkingMode ( EWorkingMode eMode ) = 0;
121 : virtual bool isCallRejected ( ERejectReason& eReason ) const = 0;
122 : virtual void registerTransaction ( EExceptionMode eMode , ERejectReason& eReason ) throw( css::uno::RuntimeException, css::lang::DisposedException ) = 0;
123 : virtual void unregisterTransaction ( ) throw( css::uno::RuntimeException, css::lang::DisposedException ) = 0;
124 :
125 : protected:
126 0 : ~ITransactionManager() {}
127 : }; // class ITransactionManager
128 :
129 : } // namespace framework
130 :
131 : #endif // INCLUDED_FRAMEWORK_INC_THREADHELP_ITRANSACTIONMANAGER_H
132 :
133 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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